package com.example.demo;

public class TestApp {
    public static void main(String[] args) {
        Circle circle = new Circle();
        System.out.println("圆的面积是：" + circle.area(3.5f));
        Rectangle rectangle = new Rectangle();
        System.out.println("矩形的周长是：" + rectangle.perimeter(3.5f, 5.6f));
    }
}
